Vulnerability-Lookup

CVE-2026-51537 (GCVE-0-2026-51537)

Vulnerability from cvelistv5 – Published: 2026-07-13 00:00 – Updated: 2026-07-14 13:16

Summary

EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-14 13:16 UTC

CWE

n/a
CWE-125 - Out-of-bounds Read

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2271 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/EIPStackGroup/OpENer/issues/564
https://gist.github.com/MrAlaskan/a5fb0fb7765c9df…

Show details on NVD website

JSON

To clipboard

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          }
        ],
        "id": "CVE-2026-51537",
        "lastModified": "2026-08-11T16:42:16.093",
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                "confidentialityImpact": "HIGH",
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            }
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        "published": "2026-07-13T22:16:47.387",
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      "source": "Red Hat CSAF VEX",
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              {
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              {
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                ],
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              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
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            {
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              "vendor": "n/a",
              "versions": [
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            }
          ],
          "problemTypes": [
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}

FKIE_CVE-2026-51537

Vulnerability from fkie_nvd - Published: 2026-07-13 22:16 - Updated: 2026-08-11 16:42

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Summary

References

URL	Tags
cve@mitre.org	https://gist.github.com/MrAlaskan/a5fb0fb7765c9df80d28220ed558f04e	Third Party Advisory
cve@mitre.org	https://github.com/EIPStackGroup/OpENer/issues/564	Exploit, Issue Tracking, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/EIPStackGroup/OpENer/issues/564	Exploit, Issue Tracking, Vendor Advisory

Impacted products

	Vendor	Product	Version
	opener_project	opener	2.3.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:opener_project:opener:2.3.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "6672F381-CA65-4595-BD10-AC6B9DED4809",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication."
    }
  ],
  "id": "CVE-2026-51537",
  "lastModified": "2026-08-11T16:42:16.093",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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          "options": [
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          ],
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}

GHSA-7WPF-VHM2-3MPW

Vulnerability from github – Published: 2026-07-14 00:31 – Updated: 2026-07-14 15:32

Details

Severity

9.1 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-51537"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-13T22:16:47Z",
    "severity": "CRITICAL"
  },
  "details": "EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication.",
  "id": "GHSA-7wpf-vhm2-3mpw",
  "modified": "2026-07-14T15:32:09Z",
  "published": "2026-07-14T00:31:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-51537"
    },
    {
      "type": "WEB",
      "url": "https://github.com/EIPStackGroup/OpENer/issues/564"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/MrAlaskan/a5fb0fb7765c9df80d28220ed558f04e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-51537 (GCVE-0-2026-51537)

FKIE_CVE-2026-51537

GHSA-7WPF-VHM2-3MPW

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour